|
|
|
|
||
|
Tucson,AZ
Joined Dec 2007
4,367 Posts
|
Quote:
i may have found a place to get 64 pitch 6tooth, 7tooth,and 8tooth pinions with 1.5mm bore. these will be perfect for the losi motors in your frame! So can you make me some carbon frames for my new website? -johnw |
|
|
|
||
|
|
Quote:
Thanks John, about the Carbon frames. Yes I can make some for your site also. I'll send you my price quotes via Email. |
|
|
||
|
|
|
|
Portland,Oregon U.S.A.
Joined Sep 2007
5,141 Posts
|
mia frame stock tailcase
someone here mounted the stock tailcase on the mia frame-I would like to do that rather than use dd tail-tail motor is working hard enough!
if anyone has done it-how? just reamed it out a little? I am getting my frame in a few days(I hope) so any pointers would be great! watched vids,though I dont have a chamfering tool! any other options? thanx MK |
|
|
|
|
||
|
Tucson,AZ
Joined Dec 2007
4,367 Posts
|
geared tail on MIA frame
Quote:
-johnw |
|
|
|
||
|
Tucson,AZ
Joined Dec 2007
4,367 Posts
|
tail boom length?
Quote:
may i make a recommendation? i think you should make the length of the tail boom shorter so the gyro doesn't have to work so hard stabilizing the added mass. maybe it should be kept at stock length? just an idea. what do you think? just let me know how soon you can make those carbon frames for me! thanks again, johnw |
|
|
||
|
|
||
|
|
Boom Length - Moment Arm, Weight, Speeds and Torque
Quote:
John, the gyro will work less with a longer moment arm (longer boom)but it also depends on the mass at the very tip of it and how much pitch on the main blade the tail has to counteract that force. The rule of thumb in this is, the loger the boom and lighter the tail section, the less power required to the tail end. Reason why direct drive works great in my current setup with the stock components and should work better with a brushless setup because of the higher RPM involved and less torque, if we streamline the blade pitch a little bit more. High torque on a helicopter main rotor means a harder working tail. I prefer higher speeds and this you get with the high speed brushless motors already. But the boom as I have it designed, can be moved in and out, reason I don't like setting boom end stops or making booms stricly to a certain length. But it all has been preset and figured out for a length that is not too long and not too short. I do a lot of my tests with a lab power supply, thrust fixtures, voltage and current meters to tell me exactly where my power limits are. So don't worry about the lengh so much. Also the carbon pieces for the tail will be lighter too, and you can always use the original 4#3 carbon tube with a a bit more heat shrink tubning to pressure fit it in the MIA frames, as an alternative. But I am still supplying my own booms because they are stronger. Metal pinions are smoother, I prefer stainless steel ones, like I use on MIA the Bumble Bee kits, because they are very smooth when meshed with nylon or similar polymer spur gears. I can also get those pinions made with the different size bores and since they are the same 64 pitch that is not a problem, however, there will be a penalty in weight for the metal part vs. a plastic pinion. I can mold pinions with any bore from 6T on up, but I have to create the tooling and this normally takes time. |
|
|
|
|
|
South East, MN
Joined Mar 2007
1,233 Posts
|
john, in one of your pictures, of your MIA frame, (the first pic) it looks like you've cut your antenna down to ~2" is that the 2.4ghz version or do you have a loaded antena or is it the stock antenna? I'm really considering the idea of an MIA frame, they do look REALLY good.
|
|
|
|
|
|
|
|
Regarding the tail motor getting warmer/having to work harder. I rigged 2 stock blades to make a 4 blade tail rotor. This seems to make the tail motor spin slower/not work as hard. Anybody have any thoughts on this?
Also I had a thought about the tail drift. I noticed that my main motor is starting to lose power (need to change it out, I have TONS of spares), and like with the stock setup, I notice the tail does not hold the same with low power at the main motor. Another thing I noticed is that if I have a hard landing, the fly bar, or blades hits the swash guide. I don't know if anyone else has this issue or not. Seems like either the guide is a little to tall, or the head is a little to low. |
|
|
|
|
||
|
Tucson,AZ
Joined Dec 2007
4,367 Posts
|
antenna
Quote:
No i coiled up the antenna and put it in the canopy. it doesn't seem to effect radio range with the fm set up. -johnw |
|
|
||
|
| Thread Tools | |
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Mini-HowTo WALKERA 4#3 Mods. | Vario3 | Micro Helis | 77 | Oct 31, 2008 12:20 PM |
| Discussion Submicro Walkera 4#3 FP - 4 channel piccoz sized heli! | sketchaholic | Micro Helis | 6422 | Mar 07, 2008 06:27 PM |
| Sold Walkera 4#3 flys awesome! | trab1925 | Aircraft - Electric - Helis (FS/W) | 7 | Feb 26, 2008 11:08 PM |
| Discussion Walkera 4#3 mods | red-panda | Micro Helis | 10 | Oct 11, 2007 01:45 PM |
| Discussion Walkera 4#3 | axelen | Micro Helis | 11 | Aug 19, 2007 07:19 AM |